Coin controlled vending machine



June-29, 1943. e. R. SUTHERLAND 2,323,255

COIN CONTROLLED VENDING MACHINE Filed July 26, 1940 '11 Sheets-Sheet 1 INVENTOFi acne-E R-SUTHERLANDI June 29, 1943. G, R. SUTHERLAND 2,323,255

COIN CONTROLLED VENDING MACHINE Filed July 26, 1940 ll Sheets-Sheet 2 INVENTOR Res H.6UTHERLAND M H I I, I

June 29, 1943. a. R. SUTHERLAND COIN CONTROLLED VENDING MACHINE .Filad July 26. 1940 11 Sheets-Sheet 3 INVENTOR ORGE R. SUTHERLAND ATTORNEY June 29,1943. SUTHERLAND 2,323,255

COIN CONTROLLED VENDING MACHINE Filed July 26, 1940 1'1 Sheets-Sheet. 4

5 I 7 v INVENTOB RGE R. su'rHEHL-AN TTORNEY June 29, 1943. e. R. SUTHERLAND 2,323,255

COIN CONTROLLED VENDING MACHINE Filed July 26, 1940 11 Sheets Sheet 5 I I INVENTOR GEORGE RSUTHERLAND June 29, 19 3- G. R. SUTHERLAND COIN CONTROLLED VENDING MACHINE l1 Sheets-sheaf, 6

Filed July 26, 1940 MW n T N NL MM ER W m U 6 on R O June 29, 1943. G. R. SUTHERLAND COIN CONTROLLED VENDING MACHINE Filed July 26, 1940 ll Sheets-Sheet 7 INVENTOF? GEORGE FT. SUTHERL-AND June 29, 1943.

COIN CONTROLLED VENDING MACHINE Filed July 26. 1940 G. R. SUTHERLAND 12.1 Sheets-Sheet 8 IN VENTOR ORGE H.5UTHEHLAND 11 Sheets-Sheet 9 R Y 0 E v 1 MW m E T haw/w; "40 w mm. M. Y H /%fln m W H n u W 6-H I H... R E a R m G June 29, 1943. G. R. SUTHERLAND COIN CONTROLLED VENDING MACHINE Filed July 26. 1940 June 1943- c-z. R. SUTHERLAND COIN CONTROLLED VENDING MACHINE 1940 11 Sheets-Sheet 10 Filed July 26 Y n i INVENTOR saei: H.5UTHEfiLAND June 29, 1943. G. R. SUTHERLAND COIN CONTROLLED VENDING MACHINE Filed July 26, 1940 R O T N E V N I Patented June 29, 1943 UNITED STATES PATENT OFFICE 40 Claims.

This invention relates to a coin controlled vending machine.

An object of the invention is to provide a machine flexibly adapted to receiv any coin of a variety of denominations, to permit the user to obtain any articles of a number of types in such quantities as he desires, and'to obtain the proper change if the value of the coin inserted exceeds the total value 01' the articles purchased.

Another object of the invention is to provide a coin receiving mechanism adapted to receive coins of various denominations.

A further object is to provide an adjustable credit mechanism adapted to be set to a credit proportional to the value of the coin inserted in the machine by the user.

A further object of the invention is to provide article dispensing mechanism adapted to deliver articles of different type and in diiTerent quantitles.

A still further object of the invention is to provide change mechanism for dispensing change to the user at the conclusion 01' his operation of the machine.

Another object of the invention is to provide means for automatically adjusting the credit mechanism upon the deposit of a coin to a setting proportional to the value of the coin received.

Another object of the invention is to provide means for automatically lowering the setting of the credit mechanism proportionally to the value of the article or articles dispensed.

A further object of the invention i to provide control means for the change making means antomatically set by the credit mechanism so that the user can obtain the correct amount of change at any time.

Another object of the invention is to provide means whereby the user can at any time operate the change making mechanism to obtain the correct change to which he is entitled.

A further object of the invention is to provide selector means which can be operated by the user after the deposit of the coin to obtain articles in the desired number of any of a variety of types.

Another object of the invention is to permit the user to obtain a desired number of articles of one type and thereafter to obtain articles of a different type.

One object of th invention is to prevent the user from obtaining articles whose value exceeds the credit of the user in the machine.

A still further object of the invention is to is exhausted.

Another object of the invention is to close the coin receiving mechanism to a deposit of further coins if the supply of change in the change making mechanism becomes insufflcient for further operation of the machine. I

A special object of the invention is to provide time controlled means for insuring that the adjusting of the credit mechanism to the setting proportional to the value of the coin inserted will be accurately completed.

Another specialobject of the invention is to provide time controlled means insuring complete operation of change dispensing action -by the change making mechanism.

A still further special object of the invention is to provide time controlled means for resetting the credit mechanism to zero setting after change has been dispensed.

Another special object of the in'ention is to reset the credit mechanism to zero setting on the insertion 01' a coin in case the previous user had credit in the machine at the end of his trans: action and did not obtain the change.

Although the invention may be used for vending articles of any nature, it possesses high utility in dispensing stamps.

A further special object of the invention is to dispense stamps in varying desired quantities of any of a number of denominations.

While it has heretofore been proposed in Brinkerhofi Patent No. 1,555,100, dated September 29, 1925, to construct a mechanically operated vending machine intended to perform some of the operations of the present invention, the numerous operations required necessitate so complicated a mechanical construction as to render the commercial production of such a machine prohibitive and require the skill and endless labor of a highly trained mechanic to sen ice. The present electrical machine can be manufactured at much lower cost, has a higher operating efficiency and can be serviced in a minimum of time.

A further object of the invention is to provide a completely electrically controlled vending machine.

A still further object of the invention is to provide an electrically operated vending machine which does not require the use of a rotary motor as the motive power for any of itsmechanisms, and wherein the various mechanisms are operated in suitable interdependent relation and proper sequence through a number of simple electric solenoids,

electrical actuators, such as and an appropriate control system. The control system for the machine necessarily makes use of a multiplicity of electric circuit makers and breakers in its various branches. These are designed to be simple and rapid in operation so that in view of the similar characteristics of the actuating devices employed, the complete operating cycle of the machine is carried out efilciently and quickly. Cam operated, solenoid operated, and, in a few instances, coin operated contact switches are employed so as to avoid the necessity of complicated rotary electric contact wheels and drums.

My invention will be further understood by reference to the accompanying drawings, in which:

Fig. 1 is a front elevation of the machine embodying my invention;

Fig. 2 is a detailed sectional view of the change making mechanism;

Fig. 3 is a vertical sectional view of the machine taken on the line 3-3 of Fig. 4;

Fig. 4 is a horizontal sectional view of my machine taken on the line l! of Fig. 3;

Fig. '5 is another vertical sectional view of the machine taken on the line 5-5 of Fig. 4;

Fig. 6 is a sectional view on the line 6-6 of Fig.

Fig-7 is a sectional view on the line'l-1 of Fig. 5;

Fig. 8 is a top view of the credit mechanism;

Fig. 9 is a sectional view of the credit mechanism on the line 9-9 of Fig. 8;

Fig. 10 is an end view of the credit mechanism;

Fig. 11 is a detailed view partly in sectionof the credit mechanism; 7

Fig. 12 is a view of the credit mechanism partly in section;

Fig. 13 is an end view of the credit mechanism partly broken away;

Fg. 14 is a detail view of part of the credit v mechanism;

Fig. 15 is a sectional view of the credit mechanism on the line l5l5 of Fig. 13;

Fig. 16 is a detail view of part mechanism;

Fig. 1'7 is a side view of the time controlled mechanism;

Fig. 18 is a sectional view on the line i8-i8 of Fig. 19;

Fig. 19 is a side view 'of the time controlled mechanism;

Fig. 20 is a sectional view of the coin receiving mechanism;

Fig. 21 is a sectional view on the line 2l2l of Fig. 20;

Fig. 22 is a sectional view on the line 22-22 of Fig. 20;

Fig. 23 is a sectional view on the line 22-22 of Fig. 20; I

Fig.'24 is a diagrammatic showing of the operating parts of the machine with the electrical control circuits involved.

As shown in the drawings, the invention is housed in a casing provided with a rear wall "I whichis shaped to form with plate lit the bottom of the casing; Enclosure I02 forms the top, side and front walls ofthe housing. Enclosure $03 is hinged at the top of the rear wall Illl by of the credit arms 602. The entire enclosure 60! can be raised.

for servicing the machine and replenishing the supply or articles to be dispensed as well as the supply of coins for the change making mechanism. The enclosure is normally locked shut by lock 6. As shown in Fig. 1, the operatin controls are placed at the front of the machine.

In the upper part of the front wall is slot Bill for receiving coins from the purchaser. Button 40 is provided for the purpose of clearing the coin receiving mechanism or defectiv coins or slugs which are returned to the change receptacle ill at the lower part of the machine.

Control pointer ISO is utilized to select the type of stamp to be purchased, and may be turned to any of windows 606, 601 or 608 in which the desired stamp may be exhibited.

Control dial 609 is used to obtain the desired number of stamps selected by pointer I80. This dial is of well known construction and is operated in the conventional manner by engaging one of the apertures 6 I! with the finger and rotating the same to the stop BIO whereupon the dial is released and returns to a condition of rest.

The stamps are delivered by suitable feeding mechanism at dispensing stations fill, M2 and 3. One type of stamp is deliverable at each station, as selected by pointer i 60, in the number desired, as selected by dial 609.

Button 252 may be operated by the user in order to obtain the change to which he is entitled. The change is delivered in change receptacle ill.

After passing through the coin receiving mechanism, the coin deposited by the user is exhibited at window 5ll where it is retained until the coin or the next user passes through the coin receiving mechanism.

In case there exists an insufficiency of coins in the change making unit for dispensing correct change for another transaction, the machine is automatically thrown out of operation, and a sign to this effect is exhibited at window 805.

The coin receiving mechanism The machine is adapted to receive coins of various denominations. Although it would be possible to provide coin receiving slots for coins of each denomination, for the convenience of the user I provide a single slot together with a coin separator adapted to separate the coins according to their denomination. After passing through the selector means, the coins may be tested to eliminate slugs and then actuate electrical switches.

The coin separator is shown in Figs. 20, 21, 22 and 23, and also appears in the sectional views of the machine in Figs. 3, 4, 5 and 7. After insertion through slot 604 the coin passes down the chute I0 into inclined separator 32. During travel through chute III the coin engages arm I2 and thereby rotates cam ll, as shown in Fi 24. This closes switch l6, as will be described later in connection with the operation of the machine.

As shown in Fig. 21, the coins ride on ledge 502 of inclined wall Bill. The coins are sized by engagement with the selector plate 503 positioned above ledge 502. Shoulder 504 deflects the quarters into chute 525. Shoulder 505 deflects nickels into chute 524. Shoulder 508 is adapted to deflect pennies mistakenly inserted into the machine. These pennies drop into chute 528 from which they are led to coin return chute 5H for conducting them to the coin return receptacle 5l8. At the end of the coin separator is chute 523 for receiving dimes.

As shown in sectional view in Fig. 23 member 521 is provided for cooperating with shoulder 504 for leading th quarters to chute 525. Similarly member 526 is provided to cooperate with shoulder 585-=i'or leading nickelsto chute 524.

Selector plate 583 is-spaced above ledge 582 so thatg'enuine coins are properly deflected, but

oiisize slugs not deflected will be jammed in the separator unit. These jammed slugs may be refrom plate 58I so that it falls into the coin return chute 5" through which it is led to receptacle 5". This operat on is shown in Fig. 21. where the deflected position of plate 581 is shown in dotted line.

For the elimination of spurious co ns which are not jammed in the coin separator. slug detectors may be provided. These are of conventional construction and may be purchased on the open market. In the machine slug detector 528. 52I and 522 are positioned to receive the coins from chutes 523. 524 and 525. (See Fig. 3.) Spurious coins are retained by the slug detectors and may be released by actuation of button 48 which operates through arms 5I3 and link 5I2. Nickel and dime slugs are led to the .change receptac'e 5I8 by chute 512 and quarter slugs bv chute 513.- (See Fig. 5.) After traversing the slug detector 522, quarters fall into chute 34 and engage arm 46 for closing switch 52. Similarly nickels traverse slug detector 52l. fall through chute 36 where they engage arm-88 to close switch 84. and dimes traverse slug detector 528. fall into chute 38 and engage arm 38 to close switch 84.

The coins engaging the switch arms are supported thereby in cooperation with bar 48. Bar 48 is actuatable by armature I58 of solenoid I48. Under the operation of the solenoid. bar 48 pivots on shaft I54 and releases the coin which is led to coin exhibitor 5'18. as shown in F g. '7. .Upon release of the coin the s ring switches o en and raise the arms for actuation bv a succeedin coin.

Solenoid 148 is used to actuate coin exhibitor 518 as well as bar 48. Through the operation of the solenoid exhibitor 518 is retracted from window 5" so that the coin is dropped to the bo tom of the casing.

The credit mechanism The credit mechanism and portions thereof are shown in Figs. 8,9.10,11.12.13,14,l5 and 16. A frame 63 is provided upon which the parts are mounted. The genera shape of frame 63 may be easily seen from the top view of Fig. 8 a s de view Fig. 10 and a vertical section, Fig. 15.

The cred t drum-is composed of fiber discs or cams 65 which are fixed to the shaft 64 and awe shownjinFlgs. 9; 12 and 15. 1

held in alignment by th pin 362 as shown in Fig.

15. The shaft 64 rotates in fixed bearing 364 and in removable bearing 366. The bearing 366 is fastened to'the plate 368 wh ch fits over the opening 318 in the frame 63. The opening 318 in the frame 63 is to allow introduct on of the credit drum 65 while assembling the mechanism. The plate 368 also bears a guide piece 3'12 which fits in the notched portion 314 ofthe shaft 64 to pre- -A gear segment 68, bearing two arms 14 and 348, is pivoted to'the frame 63 at III as shown=in Figs. 9 and15. Spring v 12 is tensioned between the arm '14 of the segment 68 and pin 318 as shown in Figs. 8 and 13, and the gear segment 68 is thus normall urged ln-a counter-clockwise direction. Gear segment 68 is linked to pinion gear 66 on the credit drum shaft 84 and consequently the credit drum is urged in a clockwise direction by the action of spring 12. I

The solenoid 3461s attached to the frame 63.

as shown in Fig. 8. The hook-shaped arm 348 is a part of the armature contained within solenoid 346. The arm 348 is in engagement with arm 343 of the gear segment 68 and, except when energized, merely rides on the arm 348 as it moves under the influence of the spring '12 shown in Fig. 13. When solenoid 346 is energized the armature and arm 348 is pulled downwardly to rotate the gear segment 68against the tension of spring I2 in a clockwise direction. The credit drum 65 is, of course, rotated in a counter-clock wise direction.

The portion of shaft 64 which extends to the right of frame 63 as shown in Fig. 15 has fixed to it the ratchet wheel 62 and the lug 16. The nut 318 and the key 388, as shown in Figs. 15 and 11, hold the lug 16 and ratchet wheel 62 fixed to the shaft 84. Freely rotatable on shaft 84 is arm 242' as shown in Figs. 11 and 15; The arm 242 carries a pivot pin 248 about which the pawl 238 is turnable. There are also two springs 382 and 384 attached to the pivot pin 248. The spring 382 is tensioned to screw 386 on the frame as shown in Figs. 10 and 13 and tends to urge the arm 242 in aclockwise direction about shaft 64. The spring 384 is a small coil spring wound about pivot 248, one end of which is hooked over arm 242 and the other end of which bears upon the pivot 388 on the pawl 238. The pawl is thus biased to the position shown in Fig.\11 with pivot '388 stopped by arm 242. The arm 236 is conmature 234 and its arm 236 will be drawn toward the solenoid as shown in Fig. 13. When solenoid 232 is deenergized the arm 242 and associated parts are pulled back by spring 382 to the original position against stop 18. The pawl 238. together with its associated parts is movable within limits formed by stop 18 and stop 2'28 at-' tached to the frame. which limitmay be shortened by use of stop 2 positioned alone against stop 228 or together with stop 2I6. The adjustment of stop 228 is made so that the energization of solenoid 232 will result in a rotation of ratchet wheel 62 through an are equivalent to three consecutive teeth of the wheel. When stop 2 I4 is p voted about 2| 8. until; rests against stop 228, the effective distance through which the pawl 238 can travel is lessened by. one tooth, that is the distance traveled is equivalent to two teeth as shown in Fig. 13. If both stop 21 6 and 2I4 are positioned against stop 228, the pawl 238 can rotate the ratchet wheel 62 but one tooth.

vent lateral movement of the credit drum 65 when thelatter hasbeen added to the assembly.-

The ratchet wheel 82 is kept from returning in a clockwise direction, until such action is desired, by master pawl 80 which is pivoted to the frame by pivot pin 882. Master pawl 80 is biased toward ratchet wheel 82 by spring member 884 as shown in Fig. 12. Under the counter-clockwise rotation of ratchet wheel 82, as in Fig. 10, the pawl 80 merely oscillates on its pivot 882, and pin 888, fixed to pawl 80, oscillates within the slot 888 in arm 88. Whenever solenoid 88 is energized the armature and associated arm 88 are urged upwardly and the pawl 80 is disengaged from the ratchet wheel 82.

In addition the extension I attached to the armature 58 rises and carries with it an insulated member IN. The spring contact 24 is biased to closed position but upon the raising of member IN the contact 24 is broken and contact I02 is made. Since the drum 85 is under spring tension to rotate in a clockwise direction as viewed in Figure 9, the associated stop 18 and ratchet wheel, when released, will rotate in a clockwise direction to set up credit in the machine until stop It strikes one of several other stops. These stops are stop 18 for twenty-five cent credits, armature 88, if solenoid 88 .is energized, for ten cents credit, and armature 88, if solenoid 88 is energized, for flve cents credit. Armatures 88 and 88 are each provided with recesses 88 and 88' in which stop it engages. The lateral pressure exerted on tire armatures by stop 18 coacting with the lower surfaces of the recess is sufllcient to prevent retraction of the armature by its retracting spring when the electric solenoid is deenergized. As will later b described, this holds the ratchet wheel 82 stationary while pawl 80 is brought into engagement with it. Armatures 88 and 98 are released on reverse rotation of stop 18 by solenoid 282.

Each tooth in the ratchet wheel 82 is equivalent to one cent credit and credit can be established only in five cent, ten cent or twenty-five ce'nt increments. Where it is desired to take a toll, for example, of one cent, the position of stop 18 is so adjusted that when credit is established there will be only four, nine, or twenty-four cents credited upon the introduction of the corresponding coin. The subtracting solenoid 282, as stated before, may subtract credit from the drum in one, two, or three cent decrements until the stop 18 again rests in its initial or zero position against stop 15.

The stops H4 and 2l6 are actuated by solenoids 222 and H0 as shown in Figure 14. Stop 2 4 may be swung into position against stop 228, Fig. 10. by solenoid 222 when energized. Armature 228, and arm 224 pivoted theretoat 400,

I are moved to the left in the drawings, and through pivot 402 stop 214 is rotated into position. Upon deenerg zation of solenoid 222, stop 2 is returned to the position shown in Fig. by spring 404 tensioned between pivot 402 and peg 408 attached to the frame 88. A similar arrangement exists in the case of solenoid 2 l 0, the similar parts being armature 2|2, arm 220, pivot 4 01,stop2|8, and spring 400, as shown in Fig. 14. Both stops 2 and H8 are pivoted on a common pin 2l8.

The shape of stop 2l8 is sl ghtly difierent from that of stop 2, however, in that a portion 230 is formed to engage the underside of stop 2. Thus, when solenoid H0 is energized stop H8 is raised into position, carrying w th it stop 2.

A part of the credit mechanism are the spring switches biased to open position and indicated generally by M0 in Fig. 9. These contacts are made of spring material and are mounted on frame 88, but are insulated therefrom by honconducting pieces "2. One side of each sprin switch member I is provided with a bent portion 4 which rests against theperipheryof its respective disc. If the portion 4" is riding on a high portion of the disc the contact will be closed and if on a low portion the contact will remain open. As will be explained, these switches set circuits to change making mechanism solenoids so that they may be energized to deliver change in value equal to the credit setting of the credit mechanism.

I provide contact switches I88, 288 and 288 which are closed by circular cams when a credit setting over a desired minimum is present on the credit mechanism.

I also provide spring contact switches 24 and The chance making mechanism In order to dispense the desired amount of change to the user of the machine, I provide a change making mechanism. This consists of coin tubes in which a supply of coins is placed and means for feeding the coins from the tubes to the change receptacle. The change making mechanism is shown in Figs. 2, 3, 4, and 6.

In the embodiment shown, coins up to a value of twenty-five cents are received. For the use of the machine a toll of one cent is taken; and the user may if he desires obtain change of twenty-four cents if he decides not to purchase any stamps. In order to make up any sum up to twenty-four cents, I provide four coin tubes for nickels and four coin tubes for pennies. BY selecting the proper combination of tubes, it is possible to provide the correct change by feedin one coin from each of the selected tubes. It will be understood that if it is desired to accept coins of larger. or smaller values than twenty-five cents, a similar arrangement involving a greater or fewer number of coin tubes could be used.

As shown in the drawings, I provide four penny tubes 888 and four nickeltubes 881.

As shown in Fig. 2, the stacked coins are suD- ported on plate 880, spaced below member 848 enough to allow one coin to pass between the two. Stripper plates 828 slide between plate 888 and member 840 and are provided with apertures 828 surrounding the bottom coin. 0n movement of the stripper plates the bottom coin is pushed beyond plate 880 and is allowed to drop into coin delivery ,chute 882. As shown in Fig. 3, the nickels are delivered to chute H8 and the pennies to chute 8i! leading to the coin receptacle. Separate actuation of the stripper plates is obtained by providing an individual solenoid for actuating each plate. As shown in Fig. 2, solenoid 808 attracts armature 824 engaging arm 5 on the stripper plate. After actuation by armature 824, the stripper plate is retracted by spring 884 and the next coin drops into aperture 320 of the stripper plate.

In order to prevent the operation of the machine when full change can not be delivered to also each provided with arm 354 which is normally horizontal, and upwardly extending arm 543. Arm 354 is normally supported by member 558 carried on rod 549.

To detect a deficiency in the coins, member 558 is rotated away from arm 354 so that detector arms 542 engage the coins. Detector arms 542 are brought into engagement with the coins by the weight of arms 354. If any tube is empty, the feeler arms 542 swing into the coin tube and arm 354 is correspondingly lowered so that its abuts against member 558 on the latters return toward its normal position.

Member 558 i rotated by solenoid I8 through connecting rod 28. Link 545 connects rod 28 to arm 548, and link 544 pivoted at 555 operates arm 541 through link 546.

Rod 28 i spring biased to the position shown in Fig. 3 by spring 55I and may be retracted by solenoid I8 as is shown in Fig. 2.

When the coin tubes all contain suflicient coins for further operation, these coins support feeler arms 542 so that under actuation of spring 55I members 588 slide up under arms 354, but if a tube is exhausted, its feeler arm 354 drops, and, as just described, limits the return travel of rod '28.

In order to prevent the insertion of more than one coin at a transaction, I provide means for closing the coin slot after the reception of the coin. This operation is performed by solenoid I 8. As described above, switch I is closed by the coin on its introduction into the coin separator. Arm I2 rotates cam I4 so that its fiat surface 628 engages the switch and holds it closed. As shown in Fig. 24, this energizes a circuit to solenoid I8. As described above, actuation of solenoid I8 rotates shaft 549 shown on the right in Fig. 2, which elevates pivot 52I and link 622. As shown in Figs. 3 and 5, link 522 is pivoted to slot closer 38 at 523. Elevation of link 622, therefore, rotates slot closer 30 on pivot 3I to close the slot to the deposit of further coins.

The rotation of slot closer 30 is utilized to operate vane I3 carrying a notice to the effect that the machine is out of operation. In the normal position, as shown in Fig. 5, vane I3, pivoted at 824, is positioned so that the sign is not exhibited through window 585. On actuation of solenoid I8, rotation of slot closer 38 which is linked to vane I3 at 625, as shown in Fig. 3, raises the vane so that the sign is carried above window 585 and is not exhibited.

In case the feeler arms detect an insufficiency of coins in one of the coin tubes, members 558 prevent the full return of connecting rod 28 to rest upon deenergization of solenoid I 8. The return movement is suflicient to allow vane I3 to take an intermediate position so that the sign is exhibited, and slot closer 38 is not retracted sufliciently to open the coin slot.

-I also provide spring member 42 which is attached to the slot closer 38 for resetting switch I5 upon denergization of solenoid I8. Arm I2 of switch I5 is raised by-member 44, pivoted at 45, and engaged in notch 43 by member 42.

I also provide, as will be explained in connection with the operation of my machine, switch 358 which is closed upon energization of solenoid I8 by connecting rod 28. Switch 358 is opened by the deenergization of solenoid I8 regardless of whether or not the full retraction of connecting rod 28 is permitted by feeling members 542.

, In order to avoid protrusion of feeler arms 542 into the coin tubes so that they will not interfere with the orderly stacking of the coins when the supply is replenished, members 555 Journaled on rods 345 may be raised by members The time controlled mechanism In order to effect complete and accurate operation of the machine, I provide time controlled mechanism for purposes to be described below in connection with the operation of the machine. The time controlled mechanism is shown in Figs. 17, 18, and 19.

I provide time delay solenoid 8 which on energization actuates armature I28 to raise the same. Armature I28 carrying pin 422 rotates arm I22 journaled on shaft 428. Movement of arm I22 immediately withdraws lug I45 and opens spring switch I44.

Pawl 435 carried by arm I22 engages seat 444 on sector 442 journaled on shaft 428. As sector 442 is rotated by pawl 435, the latter is brought into contact with fixed pin 528 which on further rotation carries the pawl out of contact with seat 444. Arm I22, with armature I28, is returned to rest by spring 538 upon deenergization of solenoid II8. 4

By action of pawl 436 sector 442 has been rotated through a limited angle against spring 538. Teeth 448 carried on sector 442 engage gear 53I to rotate the same and integrally attached arm I25. At the first rotation of arm I25, switch I34 was closed by the withdrawal of arm I25 from lug 538. Gear 53I rotates plate 531 carrying lug I28 which engages member I35. During rotation of plate 531 under actuation of solenoid I I8 member I35 is merely deflected from the path of the dog.

As arm I25 rotates under actuation of solenoid ltl8I carries pawl 532 which rides over ratche When pawl 435 releases sector 442, spring 538 reverses its direction of rotation, and pawl 532 carried by arm I25 picks up ratchet I38 as arm I26 reverses. Ratchet I38 rotates gear I32, driving gear 533 mounted to rotate with gear 534. Gear 534 drives worm 535 on shaft 535 together with governor I31. Governor I31 limits the speed of rotation of shaft 535 so that the return of sector 432 to rest under actuation of spring 538 is delayed.

During the rotation of plate 531 under actuation of spring 538, lug I28 engages member I35 and rotates the same so that detent I38 engages spring 53I to open switch I48 and to close switch I42. When arm I25 is returned to rest and through lug 538 it reopens switch I34.

It will thus be seen that the time controlled mechanism is operative upon energization of solenoid II8 to close switch I34, and at the end of a fixed time interval to reopen switch I34 and also momentarily to close switch I42 and open switch I48. The functions of these switches together with that of switch I44 will be made clear below in connection with the description of the operation of the machine.

I provide solenoid actuated article dispensing means flexibly adapted to deliver articles of a variety of types in the number desired.

As shown in Fig. in the embodiment therein, three units 634, 685 and 638 are used, one for each type of stamp.

As shown diagrammatically in Fig. 24 stamps are supplied in rolls having perforations between each stamp. Such a roll is indicated at lill from which the strip of stamps is led over guide roller I02 and around a toothed feed roller 103 which is also shown in Fig. 5. Feed roller 103 advances the stamp strip by engagement of teeth 104 in the perforations between theindivldual stamps and is actuated by a solenoid to feed out one stamp on each energization thereof.

ment into grooves 'llfl. When the fingers enter the grooves switch I9! is opened by lever 356. However, when the stamp strip is present around roller 103 the fingers are held out of the grooves I In by the stamp strip.

Consequently, switch l9l is opened when the stamp supply is exhausted and is employed for detecting such exhaustion as will be described in connection with the operation of the machine below.

Whereas only one dispensing unit has been I described, it will be understood that all three units are of similar construction.

The dispensing mechanism is fully described in the joint application of Herbert Steen and George R. Sutherland, Serial No. 275,238, flied May 23, 1939. It will be understood that other dispensing mechanisms for various types of articles may be used in place of this unit.

The selector switches As diagrammatically represented in Fig. 24

switch I58 for selecting the type of article to be dispensed operates a gang of three switches having movable contacts I, I6! and H0. The movable contacts may be selectively set to form circuits that will be described in connection with the operation of the machine.

'Dial 09 is of the conventional type and is described in further detail in. the application of Harry C. Stearns, Serial No. 320,590, filed February 16, 1940.

As shown in Fig. 24, upon movement of dial 609 from rest, contact switch I1! is closed and The relay mechanisms In the operation of my machine I employ a number of solenoid actuated relays: the credit mechanism relay, the impulse relay, and the zeroizing relay. As shown at the right in Fig. 3 these relays are mounted at the back of the casing of the machine. The credit mechanism relay consists of solenoid III which is adapted to actuate armature I". Movement of armature I" is caused to actuate switches III, Ill, H2, H4 and H6, shown diagrammatically in Fig. 24. Spring "2 retracts armature I upon deeneraization of solenoid Ill and resets the switches to their normal position.

The other relays "I and I" are similarly actuated but operate differently arranged contact switches as shown in Fig. 24.

Operation of the machine The operation of the machine will be explained in reference to the circuits shown in Fig. 24.

A coin of flve cent, ten cent, or twenty-five cent denomination is dropped in the coin chute ll. Separate chutes may be used for each of the denominations at the outset but the present structure is simpler and operates satisfactorily. The coin, in dropping downwardly, depresses the lever I2, rotating the cam H to close the switch I. The cam i4 is not spring actuated, but because of flat surfaces on the cam's operating face it will remain in either an upper or a lower position of the lever. In the upper position the contact I6 is open and in the lower position the switch II is closed. The coin passes on after having closed the switch I.

When switch II is closed solenoid I! is energized through the circuit 2|, II, It, 22, 24 and to the opposite pole 28. The armature II is urged toward the right, operating several independent mechanisms, one oiwhich will be described at this point. The movement of the armature through a series oi linkages causes the coin slot shut-oi! II to rotate about its pivot II in a clockwise direction. The upper end of the shut-oif member closes on the coin slot (not shown in diagram) from within the machine to prevent insertion of another coin until credit is established on the credit mechanism. The coin passes down the inclined coin selector 3! from which it is allowed to drop into its proper vertical chute. Chutes I25, I24, I23 are for coins of the respective denominations twenty-five cents, five cents and ten cents. It a slug or oflsize coin is placed in the coin slot and becomes jammed in the inclined selector 32, it may be removed by pushing button ll which through a series of levers operates a scavenging device, as shown in Figs. 20 and 21, and previously described. The jammed coin is swept out of the side of the selector into the coin return chute and the switch 22 is simultaneously broken to deenergize solenoid i8 and allow the coin slot shut-oi! to tall back into normal position. Whenever solenoid II is energized, the spring 42 on the horizontal arm shut-oi! 3| engages a notch 43 in looking lever ll. When solenoid I8 is subsequently deenergized, spring 42 on the downwardly moving shut-oi! arm rotates the locking lever 44 in a counterclockwise direction about pivot 45. The opposite arm or the locking lever 44 engages tripping lever l2 and urges it back to a normal position ready for the next coin. Near the end of its downward movement, spring 42 disengages notch 43 and locking lever 44 is released, assuming again the normal position as shown in the diagram after having urged lever I! to an oper able position.

Standard coin testers, such as may be purchased on the open market, may be interposed between the coin selector and the individual chutes 34,36 and 36. The rejected coins or slugs are passed into the coin return chute and the customer gets any such coins back.

If a. twenty-five cent piece has been dropped in the coin slot, the selector will cause it to fall down to chute 34, Jam against bar 48, and rest on lever 46, depressing the lever so that the cam 50, to which it i attached, closes contact switch 52. Current from the positive pole 26 is led through contact 52, resistance 54, solenoid 56, contact I58, and thence to the negative pole 20. C ntact switch 68 is normally closed and is opened only when dial 609 is not at rest. It is to b understood that wherever positive terminals are indicated, they are actually joined to a common positive pole or to one terminal of an A. C. supply indicated by the numeral 26. All the negative terminals are likewise actually joined to a common negative pole or to the opposite terminal of an A. C. supply indicated by the numeral 20. The diagrammatic form used is purely to avoid unnecessary confusion in following the various circuits. The solenoid 66, now energized, raises the master pawl armature 58 and disengages the pawl 60 from ratchetcredit wheel 62. The ratchet credit wheel 62 is rotatable within limits with the credit drum shaft 64 to which it i fixed. Pinion gear 66 is likewise fixed to shaft 64 and meshes with the gear segment 68. The gear segment 68 is normally urged in a counterclockwise direction about its pivot I by spring I2 tensioned between the machine framework and arm I4 of the gear segment. When the pawl 60 is disengaged from the ratchet wheel 62 the wheel rotates in a clockwise direction as many teeth (less one if a toll is taken) as the value in cents of thecoin inserted. The initial position of the ratchet wheel is zero credit and each tooth that the wheel advances in a clockwise direction sets up one cent credit. Conversely each retraction of the wheel results in a subtraction of one cent credit. Thus, if a quarter is inserted in the machine the ratchet wheel is released and rotates until the lug I6, which is secured to the wheel, engages stop I8, setting up twenty-five cents credit (cr twenty-four cents if a one cent toll is taken) in the machine. If a nickel is deposited instead of a quarter, it falls into tube 36 and a similar action takes place. The nickel lies against the bar 48 and depresses lever 80, rotating cam 62, and as a result closing switch 84. The circuit established by this procedure is through switch 84, solenoid 86, solenoid 66, then through switch 56 to the terminal. The energized solenoids 56 and 86 work simultaneously, solenoid 66 releasing the ratchet wheel in a clockwise direction as explained before and solenoid 86 bringing its armature 86 down to such a point that it will stop the lug I6 and the ratchet wheel fixed thereto. The five cent solenoid has now established five (or four) cents credit on the credit drum. Similarly, if a dime were dropped into the machine it would be fed from the selector 32 to the tube 38 and actuate the lever 90 and the cam 92 to close the contacts 94. The dime solenoid 86 and the master pawl solenoid 56 will now be operated simultaneously to set up ten cents (or nine cents) credit in the machine. The energization of the dime solenoid and the master pawl solenoid take place through the contact switch 84, solenoid 86, solenoid 56 and through closed contacts I58 in connection with the dial 608.

Whichever coin was placed in the coin slot arm which closes the circuit to the proper stop solenoid and the master pawl solenoid. The master pawl armature 58 at the end opposite the pawl has an extension I00. As the armature 58 is actuated by solenoid 56 the extension I00 biases insulated lug IOI attached to the spring contact switch members 24 and I02 so that the energization of solenoid 56 opens spring contact switch 24 and closes spring contact switch I02. As contact switch 24 is opened the circuit 26, 24, 22, I6, I8 and 20 is interrupted deenergizing solenoid I8. The armature 28 is under spring tension and upon the deenergization of solenoid I8 moves to the left, operating the coin slot closer and the locking lever 44 exactly the same as above described where the contact switch 22 was broken instead of contact switch 24. In either event the same circuit is interrupted.

As the armature extension I00 closes spring contact switch I02 a new circuit is established from terminal 26 through contact switch I02 and credit relay solenoid I04 to terminal 20. The armature I06 is actuated by solenoid I04 to open contact switch I08 which is normally closed,

, and to close contact switches H0, H2, H4 and now lies in its proper tube resting on the cam H6 which are normally open. The armature I06 performs the foregoing operations simul taneously and all of the operations in the credit relay are dependent on each other. The diagram represents the foregoing function merely in a schematic manner and it must be borne in mind that when any of the relay solenoids are energized all the contacts of the relay are shifted. The first circuit of a series of rapidly formed circuits is that through contact switch II2 from terminal 26 through time-delay solenoid II8 to terminal 20. The energized solenoid II8 raises armature I20 which is connected to the arm I22 at I24. Through a gearing mechanism not shown in the diagram, arm I26 and lug I28 are caused to rotate together in a clockwise direction While ratchet I30 and drive gear I32, which are fastened together, remain stationary. The instant that arm I 26 is caused to rotate in a clockwise direction the spring contact I34 which was held open by arm 26, is allowed to close and remains closed until arm I26 returns to its original position. During this period a circuit is established through contact switch I34 from terminal 26 through contact switch II6, which is now closed by credit relay solenoid I04, through solenoid I04 to terminal 20. Thus it is seen that this circuit is a self-looking circuit which can not be interrupted until arm I26 of the time-delay mechanism has returned and opened contact I34. As the arm I26 and lug I28 continue in the clockwise direction under the influence of the rising armature I20, the lug I 28 strikes the dOg I36 which is merely displaced by a limited counter-clockwis rotation until the lug clears the extended portion of the dog. The dog I36 resumes the position as shown in the diagram without having performed any function on the clockwise stroke of the lug I28. As the armature I20 nears the end of its upward stroke the arm I26 and lug I28 are released through a mechanism shown in detail in Figs. 17, 18 and 19 and explained under the discussion of Time controlled mechanism. Under spring tension arm I26 and lug I 28 returnto normalposition rotating governor I31 through the ratchet wheel I30 and connected gearing. However, as lug I28 passes dog I36 in a counter-clockwise direction the dog is caused to rotate oppositely. v(See Fig.

6.) While so doing the hooked portion I88 of the dog opens contact switch I40 and closes contact switch I42. Contact switch I44 is normally closed by lug I48 on arm I22, but when arm I22 is not at rest or in a lower position, that is, at all times that solenoid H8 and armature I20 are energized, contact switch I44 is open.

Contact switches I40 and I44 have no function at this instant in the operation of the timing mechanism but enter into the picture on the second operation of the timing mechanism as will be explained later. The opened contact switch I08 and the'closed contact switch H4 in the credit relay likewise have no function at this time.

As contact switch I42 is momentarily closed by the dog 38 a circuit is established through it from terminal 28, through contact switch IIO, coin-release solenoid I48 to terminal 20. The energized solenoid I48. retracts the armature I88 and rotates the U-shaped bar 48 in a clockwise direction about pivot rod I84 by means of connecting arm I82 which is an extension of the U-shaped bar 48 and is pivoted to the armature I50 at I88. The coin which was responsible for energizing the foregoing circuits may be resting on one of three levers 48, 80 or 90 depending on the coins denomination, but in any case it is released when the bar 48 is rotated in a clockwise direction and it falls down the chute to the money box. Since the contact switch I42 is established but momentarily, bar 48 drops back immediately upon deenergization of the solenoid I48. The particular lever upon which the coin was resting was holding one of three spring contact switches 82, 84 or 94 closed by means of a cam 80, 82 or 82. When the coin drops,the spring contact pressure against the cam is sufficient to raise the lever to its normal horizontal position and the contact which was held closed is again opened. The master pawl solenoid 58 is now deenergized when the coin drops past bar 48. It will be remembered that no matter of what denomination the coin was the circuit which it closed while jammed against bar 48 included master pawl solenoid 58, either alone, in series with nickel solenoid 88, or in series with dime solenoid 98.

As the master pawl armature 58 falls back to normal when solenoid 58 i deenergized, the pawl 80 engages a tooth of the ratchet wheel 82 holding it stationary at whatever position it assumed while credit was being established. It will be observed that in the case of live cents or ten cents credit, where armatures 88 and 98 respectively engage lug 18 of the ratchet wheel 82, there is a danger that the wheel will slip before master pawl 80 can engage the proper tooth. Since the nickel or dime solenoid is deenergized at the same instant as the master pawl solenoid, the lug 18 on ratchet wheel 82, under the rotational influence of spring 12, may slip by armature 88 or 98 which armatures are normally spring-retracted outwardly from the locus described by lug 18. To obviate this difliculty the end of armature 88 or 98 in contact with lug 18 is recessed at 88' or 98' so as to be held against the normal retractive spring pressure by the lateral portion of L-shaped lug I8. The foregoing details of mechanism are explained under the discussion on The Credit Mechanism and are best illustrated in Fig. 10.

Another function of master pawl armature 58 in falling back to the normal position, as shown in the diagram. is to break contact switch I02 and make contact switch 24. Obviously the making of contact switch 24 does not establish any circuit since when contact switch 24 was broken solenoid I8 was deenergized, restoring the coin slot close mechanism to normalcy and opening contact switch I8 of the same circuit as described above.

The breaking of contact switch I02, however, deenergizes the credit relay solenoid I04 which was energized through contact switch I02 from terminal 28 through solenoid I04 and to terminal 20. Since the time delay mechanism and more especially arm I28 of the time delay mechanism has returned to normalcy the contact switch I84 and the credit relay self-locking circuit from terminal 28, through contact switches I84, II8, I04 to terminal 20 is now open. There being no other circuit to energize the credit relay solenoid I04, the armature I08 returns under spring tension to normal position and opens contact switches H8, H4, H2, H0 and closes contact switch I08. The bars of contact switches as shown in the diagram are in this normal position. The opening of contact switches I I8, I I4 and H0 and the closing of contact switch I08 have no function at this time. However, the opening of contact switch II2 deenergizes the circuit 28, H2, H8, 20 so as to allow armature I20 to fall back to normal position.' It will be remembered, however, that the downward motion of armature I28 is merely a latching operation since the time delay mechanism operated through a latch release at the upper limit of the stroke of the energized armature I20. The details of the mechanism are described under the foregoing heading Time controlled mechanism, and are best shown in Rigs. 17, 18 and 19.

The user has done but one thing thus far in,

the operation of the machine, namely, putting a coin in the coin slot of the machine. The entire mechanism of the machine is now in exactly the same order as at the beginning of the operation except that the ratchet wheel 82 and the connected credit drum designated generally by 88 are in some position clockwise from the normal or zero credit position which is shown in the diagram. This clockwise position is indicative of credit established in the machine and is measurable in cents by the number of teeth which the ratchet wheel has been allowed to advance in the clockwise direction from the normal or zero credit position.

Article selection and delivery The user now selects the denomination of the stamp desired which, in the present modification, is limited to one, two and three cent stamps but can clearly be extended to any number of denominations or types of stamps. The selector knob is shown at I49 and is rotatable to any of three positions as indicated by the pointer I88 attached to the knob I49 and th numerals or specimens of the three stamps at the positions indicated in the diagram on dial face I82. Rotatable with the knob I 49 is non-conducting shaft I84 and the electrical conducting members I88, I88 and I10 attached thereto. The electrical conducting members I88, I88 and I10 are movable to three positions corresponding to the three the three-cent position the respective contacts are I63, I65 and I61. Of these, however, contact I63 is merely a blank and does not serve to close any electrical circuit at any time.

The user having made his selection of the stamp denomination he desires, proceeds to dial the number of stamps of that denomination which he wants. The dial 609 and associated parts is much the same as that of a telephone dial. When the dial is in the zero or normal position contact switch I58 is closed and contact switch I12 is open. The moment the dial is perated or is in a position clockwise from that at rest, contact switch I58 is opened and contact switch I12 is closed by arm I14 rotating with the dial. The opening of contact switch I58 has no function at this time but the contact switch I72 established a circuit which is completed with each electrical impulse given by the dial on its return rotation. Assuming for the present that the user has selected the one-cent stamp denomination as shown in the diagram and that he has suflicient credit in the machine, let him dial for a desired number of these stamps. The number which he dials will determine the number of times cam I16 rotating with gear I18 will allow spring contact switch I80 to close and open. The pinion gear I18 is driven directly by drive gear I82 rotating with the dial 609 on its return stroke in a counter-clockwise direction. At the zero or normal position of the dial 609 the raised part of cam I16 is always in contact with the arm I84 of spring contact switch I80 to keep the contact open. Each closing of contact switch I80 results in an energization of impulse relay solenoid I86 and consequent movement of the armature I88 to close all the contact switches I90, I92 and I94 of the impulse relay. The circuit by which this is established consists of solenoid I86 from terminal 20 through contact switch I80, solenoid I86, contact switches I53, I9I, I93, 24 and to terminal 26. Th spring contact switch I93, which is biased to open position and is normally open at the zero credit position of the drum 65, is now closed because there is credit established in the machine. Switch I9I i closed because the stamp dispenser is loaded.

Cam disc I95 controls the operability of the penny stamp circuit, that is as long as there is at least one cent credit in the machine the spring contact switch I93 will be held closed, but at zero credit the notch in disc I95 allows spring contact switch I93 to open. With the cam disc drum, at zero position as shown in the diagram,

no electrical impulse can be given impulse solenoid I86. Consequently, no one-cent stamps can be obtained from the machine by dialing member 609 unless there is at least one cent credit in the machine. If a greater number of one-cent stamps are dialed than credit will allow, the machine will stop dispensing when the disc I95 reaches the zero position shown.

Cam discs I95, I98 and 202 are credit-sulficiency determining discs. Cam disc I95, as just explained, determines when'the credit setting is zerolzed and no more one-cent stamps can be obtained. Cam disc I98 operates in connection with the two-cent stamp circuit established by rotating knob I49 so that pointer I60 coincides with the numeral 2 on the panel I62. It .will be noted'that the notch or portion of reduced diameter, 200 on cam disc I98 is slightly wider than the notch I96 in cam disc I95. Thus the ratchet wheel 62 can have an advance of one I95, and of course, the rest of the credit.

tooth, or one-cent credit, established on the drum but spring contact switch 206 biased to open position in the notch of disc I98 will still be open. If a user attempts to obtain one or more two-cent stamps with one cent or no credit in the machine, impulse solenoid I86 will not be energized and as a result he can obtain no stamps, Now, however, if the ratchet wheel 62 is advanced two teeth in a clockwise direction there is two cents credit in the machine and the notched portion 200 of cam disc I98 will have passed spring contact switch 206 which is then closed by the raised portion of the disc. If the user dials one or more two-cent stamps under this condition exactly one two-cent stamp will be dispensed and no credit remains.

Likewise the cam disc 202 and the notched portion 204 in its periphery determines whether there is sufiicient credit for a three-cent stamp. If, while three-cent stamps are being vended, a point is reached where there is less than three cents credit remaining in the machine, spring contact switch 208 will be biased into the notch 204 and the three-cent circuit will be interrupted. The user now may turn the indicator I60 to a stamp of lesser denomination for which there is still enough credit in the machine, or he may get his cash change as will b described further on.

Returning now to the one-cent stamp circuit, solenoid I86 is energized with each closing of the circuit and the amendment movement of armature I88 closes all the contact switches I90,

I92 and I94 as previously mentioned. Since the dial 609 is oif its zero position, contact switch I12 is closed. With each impulse of the solenoid the impulse relay closes contact switch I94, establishing the circuit I94 from terminal 26, I80, solenoid I86, to terminal 20. As may be seen this circuit is merely a duplication of energization of solenoid I86 and depends on the closing ofcontact I to be established. The purpose. of this duplicate energization is to lock solen oidI-86 in an energized state for the full period that contact switch I80 is closed. This is necessary when, for instance, a three-cent stamp is dialed and a three-cent credit obtains. The credit-sufliciency determining disc 202, although closed at the beginning of the energization of solenoid I86, immediately opens at the two-cent position as above described and were there no self-locking circuit the solenoid I86 would not remain energized for the full pulsation period. The associated operation about to be explained would then be interrupted before their completion.

Another circuit established with the stamp selector in the one-cent position is that from terminal 26 through I94, I12, I66, solenoid 2I0 and to terminal 20. When the solenoid 2I0 is energized the armature 2| 2 is pulled to the left of its position in the diagram. Stops 2M and 2I6 are rotated in a clockwise direction around pivot 2I8 by connecting arm 220. Stops 2I4 and 2I6 are mounted on pivot 2I8 but are not fastened together. (See Figs. 10 and 13.) Stop 2I4 can act independently of stop 2I6 but stop 2I6 can not act independently of stop 2I4. When solenoid 222 is energized, that is if the selector knob I58 and pointer I60 had been in the two-cent position instead of the one-cent position, arm 224 would have been actuated by armature 226 to rotate stop 2 against stop 228. However, when the solenoid 2I0 in the one-cent circuit actuates arm 220, the stop 2"; carries along with it stop 2| 4 because of the laterally extending lug 230 on stop 2I6 which catches stop 2I4. The purpose of 

